Gravity BMP581 Barometric Pressure Sensor I2C UART

The Gravity barometric pressure sensor from DFRobot measures air pressure and temperature with the Bosch BMP581. The absolute accuracy is ±0.3 hPa, the noise is below 0.1 Pa, and DFRobot specifies the relative altitude accuracy as ±0.5 m. It connects via I2C or UART with the Gravity connector and runs on 3.3 V and 5 V.

Similar sensor with the Bosch BMP585, according to DFRobot for environmental measurements in industry and agriculture: Gravity BMP585 High Precision Air Pressure and Temperature Sensor I2C UART

Note: The connection cable can be converted to male pins with a Dupont cable M-M, so that it also fits an Arduino UNO.

Recommended Accessories:

• Dupont Cables M-M 10cm 20 Pieces

Features:

• Air pressure and temperature, from which the altitude can be calculated
• I2C or UART, selected with the switch on the board; the setting is stored after power-off and takes effect after a restart (DFRobot)
• I2C address 0x47, can be changed to 0x46
• IIR filter and FIFO memory in the sensor smooth the readings and relieve the microcontroller
• Pin INT as interrupt output
• 2.54 mm pin header as an alternative to the Gravity connector
• Library and example code for Arduino by DFRobot, Modbus registers for UART operation in the wiki

Application Examples:

• Altitude hold for drones
• Weather station and data logger for air pressure
• Floor detection and indoor navigation
• Altimeter for hiking and sports
• Supplement to GPS

Documentation:

• Wiki DFRobot SEN0665 with example code for Arduino
• Library DFRobot_BMP58X (GitHub)
• Schematic (PDF)
• Datasheet (PDF)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0665
• Sensor: Bosch BMP581
• Operating voltage: 3.3 to 5 V DC
• Operating current: 700 µA
• Interface: I2C or UART
• I2C address: 0x47 (default) or 0x46
• Pressure range: 30 to 125 kPa
• Temperature range: 0 to 65 °C
• Absolute accuracy: ±0.3 hPa (typical)
• Relative accuracy: ±0.06 hPa per 10 kPa (typical)
• Relative altitude accuracy: ±0.5 m per 10 kPa
• Temperature coefficient: ±0.5 Pa/K
• Noise: below 0.1 Pa (RMS, without low-pass filter)
• Pins: D/T (SDA or TX), C/R (SCL or RX), GND, VCC, INT
• Connectors: Gravity PH2.0 4-pin and 2.54 mm pin header
• Dimensions: 32 × 27 × 7.18 mm, hole spacing 25 × 20 mm, holes 3 mm
• Weight with packaging: 14 g

Scope of Delivery:

• 1× Gravity BMP581 Barometric Pressure Sensor
• 1× Gravity sensor cable PH2.0 4-pin
• 1× pin header 10-pin 2.54 mm